Class CustomAggregateFunctionRegistry
- java.lang.Object
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- org.eclipse.rdf4j.common.lang.service.ServiceRegistry<java.lang.String,AggregateFunctionFactory>
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- org.eclipse.rdf4j.query.parser.sparql.aggregate.CustomAggregateFunctionRegistry
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@Experimental public class CustomAggregateFunctionRegistry extends ServiceRegistry<java.lang.String,AggregateFunctionFactory>
ServiceRegistry
implementation that stores available custom aggregate functions that can be used during query evaluation.
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Field Summary
Fields Modifier and Type Field Description private static CustomAggregateFunctionRegistry
instance
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Fields inherited from class org.eclipse.rdf4j.common.lang.service.ServiceRegistry
logger, services
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Constructor Summary
Constructors Constructor Description CustomAggregateFunctionRegistry()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static CustomAggregateFunctionRegistry
getInstance()
protected java.lang.String
getKey(AggregateFunctionFactory service)
Gets the key for the specified service.
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Field Detail
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instance
private static final CustomAggregateFunctionRegistry instance
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Method Detail
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getInstance
public static CustomAggregateFunctionRegistry getInstance()
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getKey
protected java.lang.String getKey(AggregateFunctionFactory service)
Description copied from class:ServiceRegistry
Gets the key for the specified service.- Specified by:
getKey
in classServiceRegistry<java.lang.String,AggregateFunctionFactory>
- Parameters:
service
- The service to get the key for.- Returns:
- The key for the specified service.
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